Pick the incorrect statement regarding bird flu.

Options

A. It is an avian influenza
B. It is not caused by `H_5N_1` virus
C. It is not fatal disease in birds
D. Humans are affected by bird flu as a result of direct or close contact with infected poultry.

Answer

To solve the question regarding bird flu and identify the incorrect statement, follow these steps:

### Step 1: Understand Bird Flu
Bird flu, also known as avian influenza, is primarily caused by the H5N1 virus, which is a subtype of the influenza A virus.

### Step 2: Analyze the Statements
1. **Statement 1**: Bird flu is caused by the H5N1 virus.
- This statement is **correct** as H5N1 is a well-known strain of the virus responsible for bird flu.

2. **Statement 2**: Bird flu is also called Influenza A.
- This statement is **correct** because bird flu is a type of influenza A virus.

3. **Statement 3**: It is not a fatal disease in birds.
- This statement is **incorrect**. Bird flu can be fatal in birds, especially in domestic poultry.

4. **Statement 4**: Humans are affected by bird flu as a result of direct or close contact with infected poultry.
- This statement is **correct**. Humans can contract bird flu through close contact with infected birds.

### Step 3: Identify the Incorrect Statement
From the analysis, **Statement 3** is the incorrect statement regarding bird flu, as it suggests that bird flu is not fatal in birds, which is false.

### Final Answer
The incorrect statement regarding bird flu is: **It is not a fatal disease in birds.**

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